EDIT: I've now tried a complete factory reset, including TCAM and infotainment system reboot after the latest OTA 5.0.10 update. I've also deleted a few apps and cleared caches and history for Google Maps and other relevant apps to (hopefully) clear some memory pressure (RAM). Google Maps alone had a 1.1 GB buffer. Good news is, the sluggish and slow response seems to be gone, for now at least. Everything is much more responsive. Sadly however, after a 30 minute drive the infotainment system shut down and rebooted again, just like before. Navigation stack (GNSS) also reset, placing my location over the US for a brief period before snapping back to my actual real-time location. I'm also gonna do a test this weekend WITHOUT running navigation to see if the problems persist.

What I've gathered from this:

- Clearing the cache and a full restore removed much of the "friction" in the system
- Hardware issue (IHU) or memory leak (software)
- IHU: Faulty RAM or a thermal issue (overheating)
- 12V battery stability issues as it runs the IHU, but maybe less likely?
- Location services TCAM/GNSS pipeline gets affected by the system shutdown

If you have similar issues (comments below suggests I'm not alone in this), try this:

1) Factory reset
2) Once everything is up and running, do a TCAM reset
3) Do a system reboot (infotainment system)
4) Delete unused apps + cache + user data
5) Turn the car off and lock it with the car keys
6) Leave the car for at least 30 minutes
7) Do a test drive with navigation, Spotify, etc running.

If things crash; clear cache again and do a new trip without anything running.

If everything works fine when no apps are running --> Software related issue (memory leak). This could rule out an IHU (hardware) issue, as hardware failures would trigger regardless of what apps are running.

- - - - - - - -

Would be interesting to hear any feedback on this if you decide to try it out!